Patent GB-598245-A (GB)
Title: Improvements in or relating to wrapping machines
IPC: B65B11/42
Filed: 1945-02-05
Abstract: 598,245. Wrapping-machines. BRONANDER, W. B. Feb. 5, 1945, No. 2910. [Class 94 (i)] A wrapping-machine of the kind in which an article with a wrapper strip arranged about three of its sides is deposited in a pocket of a device cooperating during its rotation with members effecting further the wrapping of the article comprises a movably mounted supporting table for receiving articles, a stationary plate above the table, means for resiliently moving the table toward the plate aligned openings in the plate and table to receive a wrapper strip, means for feeding the articles along the table, and means for feeding a wrapper strip through the openings and in the path of movement of the articles fed along the table. As shown, the articles A, Figs. 1 and 2, are fed along a table 15, which is pivoted at 16 and urged upwards by springs 17, 18 by a rod 25 betweer two feed chains 26, 27 tc engage the wrapper strip W which hangs dowr through an opening 28 ir the table. A knife 47 cuts a length from the wrapper strip W after it is wrapped around the top, front and bottom of the article which is then fed into a pocket P of a turret wheel 55. The wrapper now has two rearwardly extending flaps 61, 62 and the lower flap 61 is engaged by the rod 25 as it is carried round by sprockets 140 and moved downwardly to contact a wick 63 having one end in an adhesive-containing well 66 carried by a bracket 64 on a shaft 65 and connected to an arm 67 which can be raised to hold the wick out of its operative position. The turret wheel 55 is mounted on a shaft 56 which also carries a wheel having six pear-shaped lugs which are engaged by two rollers 80, 81 mounted on a wheel or a shaft 78 having a gear 77 meshing with a gear 76 on the main drive shaft 75 to form a Geneva movement to rotate the turret wheel 55 in steps of 60 degrees. The gear 77 also meshes with a gear 112 on a shaft 95 which carries two eccentrics 93, 102 having pivoted arms 92, 101 linked to arms 90, 100. The arm 100 is fixed to a shaft 88 to which is attached an arm 99 carrying an arcuate plate 98, and the arm 90 is fixed to a sleeve 89 rotably mounted on the shaft 88 and having an arm 86 carrying a grooved arcuate plate 85. The plates 85, 98 are arranged to engage in turn and fold the projecting flaps 61, 62 of the wrapper, when the turret wheel has turned through 120 degrees. A heater 105 is provided to heat the plate 98 to help setal the adhesive. The package is now as shown in Fig. 8 and when the turret wheel turns through another step, the rear parts of the wrapper extending at the sides of the article are engaged and tucked in by two blades 126, 127 carried on sprockets 116 which also carry chains 117 having lugs 118 to eject the article from the pocket P and feed it along a table 121 which has upright flanges 130 to tuck in the front parts of the wrapper. Slots 131, 132 in the walls of the table fold the remaining flaps, and heat sealers may be provided beyond the slots. The wrapping strip W is fed round the roller 37 and between the rollers 34, 35 ; a narrow tear strip T from a roll 30 is also fed between the rollers 34, 35 and is pushed by a lug 41 on the roller 34 co-operating with a hole 40 in the roller 35 into an H-slit in the wrapper strip W which has been formed by a knife 38 on a roller 39 co-operating with the roller 37. A knife 43 on the roller 44 then cuts the tear strip T and the wrapper strip is fed between rollers 45, 46, past roller 48 into the path of the articles A. The knife 47 on the roller 48 coacts with the statiomary knife 49 to cut the wrappers from the strip.